Co-ordinated contractions of the genitourinary tract leading to the ejection of spermatozoa and seminal fluid describe which process?

Co-ordinated contractions of the genitourinary tract leading to the ejection of spermatozoa and seminal fluid describe which process?

• A. Ejaculation
• B. Ejaculatory duct
• C. Embryo fragmentation
• D. Embryo donation (for reproduction)

Answer: (A)

Ejaculation is the coordinated action that ejects sperm and seminal fluid from the male reproductive tract. It has two stages. First, emission involves the movement of sperm from the epididymis into the vas deferens and mixing with secretions from the seminal vesicles and prostate to form semen; the bladder neck closes to prevent retrograde flow. Then, expulsion uses rhythmic contractions of the pelvic floor muscles, guided by the pudendal nerve, to push semen through the urethra and out of the penis. The other options are either anatomical structures or unrelated reproductive concepts, not the process of ejecting semen.

Ejaculation is the coordinated action that ejects sperm and seminal fluid from the male reproductive tract. It has two stages. First, emission involves the movement of sperm from the epididymis into the vas deferens and mixing with secretions from the seminal vesicles and prostate to form semen; the bladder neck closes to prevent retrograde flow. Then, expulsion uses rhythmic contractions of the pelvic floor muscles, guided by the pudendal nerve, to push semen through the urethra and out of the penis. The other options are either anatomical structures or unrelated reproductive concepts, not the process of ejecting semen.